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Although they appear white or yellow in color, polar bears’ fur is actually clear and hollow, and their skin is black.

Two coats of fur and a thick layer of blubber help insulate the polar bear’s body from the cold, keeping its temperature at an even 37° C (98.6° F).

Polar bears’ paws are especially adapted for walking on the ice and swimming in the sea. Hairs and bumps on the soles of their feet provide traction, while webbing between their toes allows for effective swimming strokes.

Polar bears can smell a seal’s breathing hole, or aglu, up to one mile away.

Polar bears do not hibernate like other bears, but females do enter into a dormant state while pregnant.